1.

Factories: x2 – ax – bx + ab

Answer»

x2 – ax – bx + ab 

Let’s arrange the terms in a suitable form; 

x2 – ax – bx + ab 

= x2 – bx – ax + ab 

= (x2 – bx) – (ax – ab) 

= x(x – b) – a(x – b) 

= (x – b)(x –a) 

So we get, 

x2 – ax – bx + ab = (x – b)(x –a)



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